研究目的
Investigating the modal analysis and power coupling efficiency of gap plasmon waveguides for optical sensing applications.
研究成果
The study demonstrates an efficient method of coupling light from a high NA source to gap plasmon waveguides, achieving a coupling efficiency of up to 12.17%. The modal analysis shows modes confined at the gap, with propagation constants varying with antenna width.
研究不足
The study is limited to simulations and does not include experimental validation. The coupling efficiency is analyzed only for specific conditions.
1：Experimental Design and Method Selection:
The study involves modal analysis and power coupling analysis of gap plasmon waveguides using Lumerical mode solution and finite difference time domain (FDTD) simulation tools.
2：Sample Selection and Data Sources:
The structure consists of Silver (Ag) metallic waveguides separated by a very small gap distance on a glass substrate.
3：List of Experimental Equipment and Materials:
Silver (Ag) metallic waveguides, glass substrate, Lumerical simulation tools.
4：Experimental Procedures and Operational Workflow:
The modal analysis is carried out using Lumerical mode solution, and power coupling analysis is performed using Lumerical FDTD.
5：Data Analysis Methods:
The effect of numerical aperture on power coupling efficiency is analyzed.
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